radiator cap JEEP GRAND CHEROKEE 2006 WK / 3.G SRT Owners Manual

Cooling System
WARNING!
•When working near the radiator cooling fan, dis-
connect the fan motor lead or turn the ignition
switch to the OFF position. The fan is temperature
controlled and can start at any time the ignition
switch is in the ON position.
•You or others can be badly burned by hot coolant
or steam from your radiator. If you see or hear
steam coming from under the hood, don’t open
the hood until the radiator has had time to cool.
Never try to open a cooling system pressure cap
when the radiator is hot.
Coolant Checks
Check engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, whereapplicable). If coolant is dirty or rusty in appearance, the
system should be drained, flushed and refilled with fresh
coolant. Check the front of the A/C condenser for any
accumulation of bugs, leaves, etc. If dirty, clean by gently
spraying water from a garden hose vertically down the
face of the condenser.
Check the coolant recovery bottle tubing for brittle rub-
ber, cracking, tears, cuts and tightness of the connection
at the bottle and radiator. Inspect the entire system for
leaks.
With the engine at normal operating temperature (but
not running), check the cooling system pressure cap for
proper vacuum sealing by draining a small amount of
coolant from the radiator drain cock. If the cap is sealing
properly, the engine coolant (antifreeze) will begin to
drain from the coolant recovery bottle. DO NOT RE-
MOVE THE COOLANT PRESSURE CAP WHEN THE
COOLING SYSTEM IS HOT.
314 MAINTAINING YOUR VEHICLE

Adding Coolant
Your vehicle has been built with an improved engine
coolant that allows extended maintenance intervals. This
coolant can be used up to 5 Years or 100,000 miles before
replacement. To prevent reducing this extended mainte-
nance period, it is important that you use the same
coolant throughout the life of your vehicle. Please review
these recommendations for using Hybrid Organic Addi-
tive Technology (HOAT) coolant.
When adding coolant, a minimum solution of 50% rec-
ommended Mopar Antifreeze/ Coolant 5 Year/100,000
Mile Formula HOAT (Hybrid Organic Additive Technol-
ogy), or equivalent, in water should be used. Use higher
concentrations (not to exceed 70%) if temperatures below

34°F (
37°C ) are anticipated.
Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant solution.The use of lower quality water will reduce the amount of
corrosion protection in the engine cooling system.
Please note that it is the owner’s responsibility to main-
tain the proper level of protection against freezing ac-
cording to the temperatures occurring in the area where
the vehicle is operated.
NOTE:Mixing coolant types will decrease the life of the
engine coolant and will require more frequent coolant
changes.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of
coolant, and to insure that coolant will return to the
radiator from the coolant recovery bottle.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
316 MAINTAINING YOUR VEHICLE

WARNING!
•The warning words “DO NOT OPEN HOT” on
the cooling system pressure cap are a safety pre-
caution. Never add coolant when the engine is
overheated. Do not loosen or remove the cap to
cool an overheated engine. Heat causes pressure
to build up in the cooling system. To prevent
scalding or injury, do not remove the pressure cap
while the system is hot or under pressure.
•Do not use a pressure cap other than the one
specified for your vehicle. Personal injury or
engine damage may result.
Disposal of Used Engine Coolant
Used ethylene glycol based engine coolant is a regulated
substance requiring proper disposal. Check with your
local authorities to determine the disposal rules for your
community. To prevent ingestion by animals or childrendo not store ethylene glycol based engine coolant in open
containers or allow it to remain in puddles on the
ground. If ingested by a child, contact a physician
immediately. Clean up any ground spills immediately.
Coolant Level
The coolant bottle provides a quick visual method for
determining that the coolant level is adequate. With the
engine off and cold, the level of the coolant in the bottle
should be between the ranges indicated on the bottle.
The radiator normally remains completely full, so there is
no need to remove the radiator cap unless checking for
coolant freeze point or replacing coolant. Advise your
service attendant of this. As long as the engine operating
temperature is satisfactory, the coolant bottle need only
be checked once a month.
When additional coolant is needed to maintain the
proper level, it should be added to the coolant bottle. Do
not overfill.
MAINTAINING YOUR VEHICLE 317
7

Emergency Starting..................... 289
Keyless Transmitter Replacement (RKE)....... 24
Saving Feature (Protection)............... 120
Bearings.............................. 324
Belts, Drive............................ 304
Belts, Seat.............................. 33
Body Mechanism Lubrication............... 311
B-Pillar Location........................ 252
Brake Assist System...................... 132
Brake Control System, Electronic............. 130
Brake System........................... 319
Anti-Lock (ABS)....................131,243
Fluid Check.......................... 321
Hoses.............................. 320
Parking............................. 241
Warning Light........................ 176
Brake/Transmission Interlock............... 237
Break-In Recommendations, New Vehicle........ 69
Bulb Replacement.....................334,335Capacities, Fluid........................ 341
Caps, Filler
Fuel................................ 272
Radiator (Coolant Pressure)............... 316
Car Washes............................ 325
Carbon Monoxide Warning............70,152,271
Cargo Area Cover....................... 164
Cargo Area Features...................... 163
Cargo Compartment...................... 163
Light............................... 163
Cargo Light............................ 163
Cargo Load Floor........................ 167
Cargo Tie-Downs........................ 165
Catalytic Converter...................... 306
Caution, Exhaust Gas..................... 152
CD (Compact Disc) Player................. 198
Cellular Phone.......................... 82
Center High Mounted Stop Light............ 340
Chart, Tire Sizing........................ 249
INDEX 375
10

Checks, Safety........................... 71
Child Restraint......................59,65,67
Child Restraint Tether Anchors.............63,65
Child Safety Locks........................ 17
Clean Air Gasoline....................... 269
Climate Control......................... 222
Clock.............................200,213
Compact Disc (CD) Maintenance............. 221
Compass.............................. 190
Compass Variance....................... 196
Computer, Trip/Travel.................... 190
Console, Overhead....................... 149
Contract, Service........................ 368
Coolant Pressure Cap..................... 316
Cooling System......................... 314
Adding Coolant (Antifreeze).............. 316
Coolant Capacity...................... 341
Coolant Level......................314,317
Disposal of Used Coolant................ 317Drain, Flush, and Refill.................. 315
Inspection........................... 317
Points to Remember.................... 318
Pressure Cap......................... 316
Radiator Cap......................... 316
Selection of Coolant (Antifreeze).........315,341
Cruise Control (Speed Control).............. 146
Cruise Light........................... 181
Cup Holder............................ 162
Customer Assistance..................... 366
Data Recorder, Event...................... 57
Daytime Running Lights................... 124
Dealer Service.......................... 300
Defroster, Windshield...................71,226
Diagnostic System, Onboard................ 297
Dimmer Switch, Headlight................. 125
Dipsticks
Power Steering........................ 310
376 INDEX

Paint Care............................. 324
Paint Damage.......................... 324
Panic Alarm............................ 22
Park Assist System, Rear.................. 138
Parking Brake.......................... 241
Passing Light........................... 125
Pedals, Adjustable....................... 144
Pets.................................. 69
Pets, Transporting........................ 69
Phone, Cellular.......................... 82
Phone, Hands-Free (UConnect™)............. 82
Placard, Tire and Loading Information......... 252
Polishing and Waxing..................... 325
Power
Distribution Center..................... 330
Door Locks........................... 19
Mirrors.............................. 80
Outlet (Auxiliary Electrical Outlet).......... 160
Seats............................... 108Steering..........................246,310
Sunroof............................. 157
Windows............................. 29
Pregnant Women and Seat Belts.............. 41
Pretensioners
Seat Belts............................. 39
Programmable Electronic Features......151,156,186
Programming Transmitters
(Remote Keyless Entry).................151,156
Radial Ply Tires......................... 261
Radiator Cap (Coolant Pressure Cap).......... 316
Radio Broadcast Signals................... 197
Radio Operation......................198,221
Radio, Satellite.......................213,216
Radio (Sound Systems).................... 198
Rain Sensitive Wiper System................ 128
Rear Cup Holder........................ 162
Rear Liftgate............................ 16
384 INDEX